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arXiv 1403.6232cond-mat.str-el
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多铁性Ba3NbFe3Si2O14自形成单磁电畴铁电极化的磁控

Magnetic Control of Ferroelectric Polarization in a Self-formed Single Magnetoelectric Domain of Multiferroic Ba3NbFe3Si2O14

Nara Lee, Young Jai Choi, Sang-Wook Cheong

摘要:

我们发现了具有晶体手性的硅酸镧镧镓钡铌铁硅单晶Ba_3NbFe_3Si_2O_(14)的单手性螺旋磁态具有很强的磁电效应。铁电极化,主要沿a轴对齐低于约27 K的Neel温度,在垂直于a轴(H//b*)的面内磁场(H)的存在下,以高度非线性的方式变化。这种ME效应以及其他方向上较小的ME效应没有表现出极化依赖性,表明存在自形成的单ME域。此外,这些ME效应伴随着不可测量的滞后,这对许多技术应用至关重要。

英文摘要:

We have discovered strong magnetoelectric (ME) effects in the single chiral-helical magnetic state of single-crystalline langasite Ba3NbFe3Si2O14 that is crystallographically chiral. The ferroelectric polarization, predominantly aligned along the a axis below the Neel temperature of ~27 K, changes in a highly non-linear fashion in the presence of in-plane magnetic fields (H) perpendicular to the a axis (H//b*). This ME effect as well as smaller ME effects in other directions exhibit no poling dependence, suggesting the presence of a self-formed single ME domain. In addition, these ME effects accompany no-measurable hysteresis, which is crucial for many technological applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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